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Opening window during Drag-Drop crashes app. [message #10371]

Wed, 04 July 2007 15:43

mrjt
Messages: 705
Registered: March 2007
Location: London

Contributor

I think this is due to the refactoring of the DnD mentioned here as this definitely not happen with 705-dev3. The reversing of the calling order seems to trigger some sort of infinite recursion/loop that only ends when Windows runs out of resources and CreateWindow fails.

It is very easy reproduce, just add a PromptOK to the ColumnListDnD example like so:

	void DropSum(int ii, PasteClip& d) {
		if(AcceptInternal<ColumnList>(d, "mydrag")) {
			const ColumnList& src = GetInternal<ColumnList>(d);
			int sum = 0;
			for(int i = 0; i < src.GetCount(); i++)
				if(src.IsSel(i))
					sum += atoi(~String(src[i]));
			list.Set(ii, AsString(sum));
			d.SetAction(DND_COPY);
			list.SetCursor(ii);
			PromptOK("Sum");
		}
	}

This breaks a major application where I frequently use Prompts to get confirmation for Drag-Drops before completion (as they initiate a database update). So I would be grateful for a fix Smile

(Its a bit beyond me).

Cheers,
James

[Updated on: Wed, 04 July 2007 15:44]

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